The Center for Public Integrity, a nonprofit investigative group, released a story today connecting a meeting between Sen. Lindsey Graham, R-S.C., and billionaire John Catsimatidis to a donation made to the West Main Street Values PAC later that day.

The West Main Street Values PAC says its mission is to "aggressively defend" Graham, according to the group's website.

Graham today faces six opponents in the Republican primary for his Senate seat.

Read the full CPI report here.